JP2001257964A - Digital broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcasting receiver capable of automatically switching a surround mode or automatically correcting a picture quality corresponding to program contents. SOLUTION: A system controller 13 detects the category code of a program under viewing from the service information of the program. When the category code is detected, setting information (such as picture quality control information or audio delay/volume setting information or each loudspeaker) set concerning a relevant category is read out of a non-volatile memory 14. Then, this setting information is supplied to a video processing circuit 5 and an audio processing circuit 6. When the setting information is received, the video processing circuit 5 performs signal processing such as color depth control or contour enhancement control, for example, based on the setting information. When the setting information is received, audio delay/volume control parts 6a-6e of the audio processing circuit 6 control the delay or volume of audio signals to be supplied to loudspeakers L, R, C, SL and SR.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving apparatus for receiving a digital broadcast.

[0002]

2. Description of the Related Art Image compression using digital signal compression technology
There is digital broadcasting that compresses audio signals and broadcasts a stream (transport stream) obtained by time-division multiplexing of video and audio digital signals of a plurality of programs via a transponder (satellite repeater). On the other hand, a broadcast receiving apparatus that receives such a digital multi-channel broadcast selects one of a plurality of transponders of the digital broadcast received through a dedicated antenna by a tuner, and selects a plurality of channels included in the one transponder. One of them is selected by demultiplex processing, and a video / audio signal is output by decoding a digital signal of the selected channel.

By the way, in such digital television broadcasting, in addition to transmitting video and audio in the same manner as conventional analog broadcasting, service information (program name, program content, program start time, program end time, program genre, etc.) ) Is also transmitted, so that the program desired by the viewer can be efficiently selected from the multi-channel broadcast. In particular, in the program genre, programs are classified into programs such as movies, sports, and music.
G (Electronic ProgramGuid)
e) When the user selects a desired program genre from the screen displayed by the screen display function, the broadcast receiving apparatus searches for program information from the stream currently being transmitted, and the program name, program content, and program start time of the corresponding program. List is displayed on the display screen.

[0004] On the other hand, there is known a conventional television broadcast receiving apparatus provided with an audio surround function in order to increase the sense of presence of audio. This audio surround function
For example, normal / cinema (for movie sources) / hall (for music) are available as surround modes.
The user can select any of these according to the program contents.

[0005]

However, in the above-mentioned conventional television broadcast receiving apparatus, the user has to switch the surround mode each time according to the program contents, and the surround mode is not automatically switched.

In view of the above circumstances, it is an object of the present invention to provide a digital broadcast receiving apparatus capable of automatically switching a surround mode according to the contents of a program and automatically performing image quality correction and the like. .

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a digital broadcast receiving apparatus according to the present invention is a digital broadcast receiving apparatus for receiving a digital broadcast. Audio processing means for processing each based on the adjustment information; detection means for detecting the genre code of the program being viewed; and providing the audio processing means with adjustment information for each audio signal based on the detected genre code. And control means.

With the above arrangement, the adjustment information for each audio signal is automatically supplied to the audio processing means in accordance with the genre of the program being received, and the audio processing means supplies the adjustment information for each audio signal. Since the processing based on the adjustment information is performed, the generation of the surround effect suitable for the genre of the program being received is automatically performed.

A digital broadcast receiving apparatus according to the present invention is a digital broadcast receiving apparatus for receiving a digital broadcast, wherein: a video processing means for processing a video signal supplied to a monitor based on adjustment information; And a control unit for providing adjustment information to the video processing unit based on the detected genre code.

With the above arrangement, the adjustment information of the video signal is automatically supplied to the video processing means in accordance with the genre of the program being received, and the video processing means converts the video signal based on the adjustment information. Therefore, adjustment such as "color tone" or "contour emphasis" suitable for the genre of the program being received is automatically performed.

It is preferable that the adjustment information can be set by a user for each program genre. According to this,
It becomes possible to reflect the user's preference in the surround effect or the video effect.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
And FIG. 2, where the user
(Broadcasting via Satelli
te) A case where digital broadcasting is received is illustrated.

FIG. 1 is a block diagram showing a digital broadcast receiving apparatus 30 of this embodiment for receiving a BS digital broadcast.

The antenna 1 is arranged outdoors in a predetermined direction, and receives a digital broadcast signal transmitted from the BS. The antenna 1 generally includes a frequency converter, and supplies a received / frequency-converted signal to a tuner 2.

The tuner 2 extracts a signal of a specific frequency from high-frequency digital modulation signals including video and audio data. That is, a process of selecting one from a plurality of digital broadcast transponders is performed. Further, the tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, and thereby demodulates the selected digital modulation signal and outputs a transport stream.

A demultiplexer (DEMUX) 3 converts the transport stream received from the tuner 2 into an MPEG2 (Moving Picture Ex
parts transport group 2) video transport packet, audio transport packet, and P
SI (Program Specific Information)
mate). The demultiplexer 3 supplies a video transport packet and an audio transport packet to the AV decoder 4, and supplies service information and the like included in the PSI to the system controller 13. As described above, a plurality of channels are multiplexed in the transport stream, and a process for selecting an arbitrary channel from among the channels is performed by the P
This can be achieved by extracting data such as which packet ID a given channel is multiplexed in the transport stream from the SI. Also, the selection of the transport stream (transponder selection) is P
It can be performed based on SI information. Further, the service information includes program information (program contents, program start time,
Program end time, genre code, etc.).

The AV decoder 4 includes a video decoder for decoding video transport packets and an audio decoder for decoding audio transport packets. The video decoder is
The input variable length code is decoded to obtain a quantization coefficient and a motion vector, and inverse DCT transform and motion compensation control based on the motion vector are performed. The audio decoder generates audio data by decoding the input coded signal. The video data generated by the decoding is output to the video processing circuit 5, and the audio data is output to the audio processing circuit 6.

The video processing circuit 5 receives video data from the AV decoder 4, performs D / A conversion, and generates a color signal and a synchronization signal to be supplied to the monitor 7. When generating the color signals and the like, the video processing circuit 5 performs signal processing based on the image quality adjustment information, for example, processing such as color density adjustment and contour emphasis when receiving image quality adjustment information from the system controller 13. Do.

The audio signal processing circuit 6 receives the audio data output from the AV decoder 4 and performs D / A conversion.
Generate an analog audio signal. In the example of this figure, five audio delay / volume control units 6a to 6e are provided, and a right (R) sound analog signal, a left (L) sound analog signal,
An analog signal of a center (C) sound, an analog signal of a rear right (SR) sound, and an analog signal of a rear left (SL) sound are generated. The analog signals generated by each of the audio delay / volume control units 6a to 6e correspond to speakers L, R, C, SL, S
Supplied to R. When receiving the audio delay / volume setting information from the system controller 13 at the time of generating the audio signal, each of the audio delay / volume controllers 6a to 6e controls the speakers L, R, C, S based on this information.
The delay amount and volume of the audio signal supplied to L and SR are adjusted.

An OSD (on-screen display) display circuit 12 outputs bitmap data based on character information instructed to be output from the system controller 13 to the video signal processing circuit 5. The video signal processing circuit 5 performs a process of incorporating the bitmap data into a video signal. The OSD display circuit 12 receives an EPG (Electronic Program) based on the service information included in the PSI received by the system controller 13.
In addition to the ram Guide) screen display, various menu screen displays are realized.

The remote control transmitter 10 is a transmitter for sending a command to the broadcast receiving device 30. When a key (not shown) provided on the remote control transmitter 10 is operated, a signal light (remote control signal) indicating a command corresponding to the key is transmitted from a light emitting unit (not shown). The remote control light receiver 11 receives the signal light, converts the light into an electric signal, and supplies the electric signal to the system controller 13.

The system controller 13 performs various processes based on user operations using the remote control transmitter 10 and the like. Then, for example, the following processing is performed as processing according to the present invention.

[0023] As shown in FIG. 2A, "genre-based preference setting" is displayed as an operation item on the menu screen using the OSD function. In this menu screen, "1.
Genre items such as "movie", "2. music", and "3. sports" are displayed.

[0024] When the genre item is selected by the user, as shown in FIG. 2B, as a surround setting, a screen portion for prompting the setting of the individual volume and delay amount in the speakers L, R, C, SL, and SR, and a video setting. ,
A screen portion for prompting settings such as “color saturation”, “hue”, “brightness”, and “outline emphasis”, and an image currently being received are displayed. The user looks at this screen and sees the remote control transmitter 1
5 can be set as desired. For example,
For a sports genre, the surrounding sound can be emphasized as a surround effect, and for a music genre, the center sound can be emphasized as a surround effect. For news, the surround effect can be turned off. The system controller 13 stores the audio setting information and the video setting information set by the user in the nonvolatile memory 14 in association with the genre.

[0025] The system controller 13 detects a genre code from the service information of the program being viewed. When the genre code is detected, the setting information (image quality adjustment information, audio delay / volume setting information for each speaker) of the genre is read from the nonvolatile memory 14. Then, the setting data is supplied to the video processing circuit 5 and the audio processing circuit 6. The video processing circuit 5 and the audio processing circuit 6
As described above, signal processing based on the setting information is performed.

As described above, according to the present invention,
The setting information (sound delay / volume setting information) for each speaker is automatically supplied to the sound processing circuit 6 according to the genre of the program being received, and the sound processing circuit 6 sets the setting information for each speaker. Audio processing based on
A surround effect suitable for the genre of the program being received is automatically generated. In addition, for example, BS
In the case of digital broadcasting, since a movie or the like is transmitted in a multi-channel stereo, a surround effect can be obtained as it is. However, such an invention enables setting (seasoning) on the digital broadcast receiving apparatus side. .

In addition, video signal setting information (image quality adjustment information) is automatically supplied to the video processing circuit 5 in accordance with the genre of the program being received, and the video processing circuit 5 converts the video signal into the setting information. , The adjustment such as “hue” or “contour emphasis” suitable for the genre of the program being received is automatically performed.

Also, since the setting information is configured so that the user can adjust the setting information for each program genre, it is possible to reflect the user's preference in the surround effect or the video effect.

In the above embodiment, five audio signals are generated based on the received five-channel audio data. However, six audio signals are generated based on the 5.1-channel audio data. Is also good. Alternatively, a virtual audio effect may be generated by generating a right audio signal and a left audio signal based on the received 5-channel or 5.1-channel audio data, and processing these signals. Further, a right audio signal and a left audio signal may be generated based on the received two-channel audio data, and a virtual surround effect may be generated by processing these signals.

[0030]

As described above, according to the present invention, it is possible to automatically switch the surround mode according to the contents of a program or to automatically perform image quality correction.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a digital broadcast receiving apparatus according to an embodiment of the present invention.

FIG. 2A is a diagram illustrating an example of a display screen of a genre item, and FIG. 2B is an explanatory diagram illustrating an example of a display screen displayed when a movie genre is selected. .

[Explanation of symbols]

Reference Signs List 1 antenna 2 tuner 3 demultiplexer (DEMUX) 4 AV decoder 5 video processing circuit 6 audio processing circuit 6a, 6b, 6c, 6d, 6e audio delay / volume control unit 10 remote control transmitter 12 OSD display circuit 13 system controller 14 nonvolatile memory

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/44 H04N 5/44 Z 5/57 5/57

Claims (3)

[Claims] 1. A digital broadcast receiving apparatus for receiving a digital broadcast, an audio processing means for processing audio signals individually supplied to a plurality of speakers based on adjustment information, and a genre code of a program being viewed. A digital broadcast receiving apparatus comprising: detecting means for detecting; and control means for providing adjustment information for each audio signal to the audio processing means based on the detected genre code. 2. A digital broadcast receiving apparatus for receiving a digital broadcast, comprising: video processing means for processing a video signal supplied to a monitor based on adjustment information; and detecting means for detecting a genre code of a program being viewed. Control means for providing adjustment information to the video processing means based on the detected genre code. 3. The digital broadcast receiving apparatus according to claim 1, wherein said adjustment information is set by a user for each program genre.